$ git clone -n https://src.fedoraproject.org/rpms/perl-Digest-Nilsimsa.git /var/lib/mock/f45-build-23130-596/root/chroot_tmpdir/scmroot/perl-Digest-Nilsimsa
Cloning into '/var/lib/mock/f45-build-23130-596/root/chroot_tmpdir/scmroot/perl-Digest-Nilsimsa'...
$ git fetch origin 8b61960c528f4e8eb6c9fc6011f70d3445d3f030:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Digest-Nilsimsa
 * [new ref]         8b61960c528f4e8eb6c9fc6011f70d3445d3f030 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b61960 Perl 5.44 rebuild