$ git clone -n https://src.fedoraproject.org/rpms/perl-Filter-Simple.git /var/lib/mock/f45-build-23632-598/root/chroot_tmpdir/scmroot/perl-Filter-Simple
Cloning into '/var/lib/mock/f45-build-23632-598/root/chroot_tmpdir/scmroot/perl-Filter-Simple'...
$ git fetch origin 87b8df6cefa6f759b00f88df39a2d0b3167a9724:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Filter-Simple
 * [new ref]         87b8df6cefa6f759b00f88df39a2d0b3167a9724 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 87b8df6 Increase release to favour standalone package