$ git clone -n https://src.fedoraproject.org/rpms/perl-B-Hooks-Parser.git /var/lib/mock/f41-build-816720-150376/root/chroot_tmpdir/scmroot/perl-B-Hooks-Parser
Cloning into '/var/lib/mock/f41-build-816720-150376/root/chroot_tmpdir/scmroot/perl-B-Hooks-Parser'...
$ git fetch origin 7b8291d38292d0dbd04dc74a0a068aefb0634141:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-B-Hooks-Parser
 * [new ref]         7b8291d38292d0dbd04dc74a0a068aefb0634141 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b8291d Perl 5.40 rebuild