$ git clone -n https://src.fedoraproject.org/rpms/perl-Algorithm-Combinatorics.git /var/lib/mock/f45-build-21572-586/root/chroot_tmpdir/scmroot/perl-Algorithm-Combinatorics
Cloning into '/var/lib/mock/f45-build-21572-586/root/chroot_tmpdir/scmroot/perl-Algorithm-Combinatorics'...
$ git fetch origin 1f5114aac8a5ee5b3a5dec12ee18063b58bc8133:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Algorithm-Combinatorics
 * [new ref]         1f5114aac8a5ee5b3a5dec12ee18063b58bc8133 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f5114a Perl 5.44 rebuild