$ git clone -n https://src.fedoraproject.org/rpms/rust-crunchy.git /var/lib/mock/epel9-build-60966104-6586806/root/chroot_tmpdir/scmroot/rust-crunchy
Cloning into '/var/lib/mock/epel9-build-60966104-6586806/root/chroot_tmpdir/scmroot/rust-crunchy'...
$ git fetch origin eac44b91d47bc88e71b300cab1c7c4061a313b6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-crunchy
 * [new ref]         eac44b91d47bc88e71b300cab1c7c4061a313b6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eac44b9 Update to version 0.2.4; Fixes RHBZ#2374752