$ git clone -n https://src.fedoraproject.org/rpms/python-inject.git /var/lib/mock/f40-build-2634966-66042/root/chroot_tmpdir/scmroot/python-inject
Cloning into '/var/lib/mock/f40-build-2634966-66042/root/chroot_tmpdir/scmroot/python-inject'...
$ git fetch origin 5b9d20426d97bcb71b75ac786ebe0023d59f8171:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-inject
 * [new ref]         5b9d20426d97bcb71b75ac786ebe0023d59f8171 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5b9d204 Update to v5.2.1