$ git clone -n https://src.fedoraproject.org/rpms/perl-experimental.git /var/lib/mock/f45-build-27640-625/root/chroot_tmpdir/scmroot/perl-experimental
Cloning into '/var/lib/mock/f45-build-27640-625/root/chroot_tmpdir/scmroot/perl-experimental'...
$ git fetch origin 990311d6fdc32aa61e091fd7385ed491b23b3e30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-experimental
 * [new ref]         990311d6fdc32aa61e091fd7385ed491b23b3e30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 990311d Increase release to favour standalone package