$ git clone -n https://src.fedoraproject.org/rpms/rust-stderrlog.git /var/lib/mock/f45-build-45196-821/root/chroot_tmpdir/scmroot/rust-stderrlog
Cloning into '/var/lib/mock/f45-build-45196-821/root/chroot_tmpdir/scmroot/rust-stderrlog'...
$ git fetch origin 23088b44836be7dfb191886e04aff7c50bcad519:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-stderrlog
 * [new ref]         23088b44836be7dfb191886e04aff7c50bcad519 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23088b4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild