$ git clone -n https://src.fedoraproject.org/rpms/rust-onefetch-manifest.git /var/lib/mock/f40-build-side-110668-59069321-6570815/root/chroot_tmpdir/scmroot/rust-onefetch-manifest
Cloning into '/var/lib/mock/f40-build-side-110668-59069321-6570815/root/chroot_tmpdir/scmroot/rust-onefetch-manifest'...
$ git fetch origin 7fd360ac8feb96c6985f607eaae4eceeefc24c65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-onefetch-manifest
 * [new ref]         7fd360ac8feb96c6985f607eaae4eceeefc24c65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fd360a Update to 2.24.0 (close RHBZ#2359239)