$ git clone -n https://src.fedoraproject.org/rpms/perl-Lingua-Stem-Snowball.git /var/lib/mock/f43-perl-60959220-6586775/root/chroot_tmpdir/scmroot/perl-Lingua-Stem-Snowball
Cloning into '/var/lib/mock/f43-perl-60959220-6586775/root/chroot_tmpdir/scmroot/perl-Lingua-Stem-Snowball'...
$ git fetch origin e72910489b0b6ce75f505fd3d5f230fbe35a3b47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Lingua-Stem-Snowball
 * [new ref]         e72910489b0b6ce75f505fd3d5f230fbe35a3b47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e729104 Perl 5.42 rebuild