$ git clone -n https://src.fedoraproject.org/rpms/perl-re-engine-RE2.git /var/lib/mock/f41-build-843876-162239/root/chroot_tmpdir/scmroot/perl-re-engine-RE2
Cloning into '/var/lib/mock/f41-build-843876-162239/root/chroot_tmpdir/scmroot/perl-re-engine-RE2'...
$ git fetch origin 9c80570a712ef571b662870397b7c05381bb35d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-re-engine-RE2
 * [new ref]         9c80570a712ef571b662870397b7c05381bb35d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c80570 Require more tests in gating