$ git clone -n https://src.fedoraproject.org/forks/music/rpms/rust-onefetch.git /var/lib/mock/f43-build-59045404-6570608/root/chroot_tmpdir/scmroot/rust-onefetch
Cloning into '/var/lib/mock/f43-build-59045404-6570608/root/chroot_tmpdir/scmroot/rust-onefetch'...
$ git fetch origin bc4183fdf03929f4cf5c54f1a2ac7e93a89993cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/music/rpms/rust-onefetch
 * [new ref]         bc4183fdf03929f4cf5c54f1a2ac7e93a89993cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc4183f Update to 0.24.0 (close RHBZ#2359241)