$ git clone -n https://src.fedoraproject.org/rpms/rust-migrations_internals.git /var/lib/mock/f45-build-43250-801/root/chroot_tmpdir/scmroot/rust-migrations_internals
Cloning into '/var/lib/mock/f45-build-43250-801/root/chroot_tmpdir/scmroot/rust-migrations_internals'...
$ git fetch origin c6e1b3a22cba80fd6356a5a0645a3f5961d9dd44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-migrations_internals
 * [new ref]         c6e1b3a22cba80fd6356a5a0645a3f5961d9dd44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6e1b3a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild