$ git clone -n https://src.fedoraproject.org/rpms/perl-Test2-Plugin-Cover.git /var/lib/mock/f41-build-816641-150311/root/chroot_tmpdir/scmroot/perl-Test2-Plugin-Cover
Cloning into '/var/lib/mock/f41-build-816641-150311/root/chroot_tmpdir/scmroot/perl-Test2-Plugin-Cover'...
$ git fetch origin d9f195e97e836127f7bd71c67a7ba077ac6096e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test2-Plugin-Cover
 * [new ref]         d9f195e97e836127f7bd71c67a7ba077ac6096e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d9f195e Perl 5.40 rebuild