$ git clone -n https://src.fedoraproject.org/rpms/mcomix3.git /var/lib/mock/f41-build-side-2-python-2708456-30473/root/chroot_tmpdir/scmroot/mcomix3
Cloning into '/var/lib/mock/f41-build-side-2-python-2708456-30473/root/chroot_tmpdir/scmroot/mcomix3'...
$ git fetch origin 641a51345735967016f92fd0ffd15977226afefe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mcomix3
 * [new ref]         641a51345735967016f92fd0ffd15977226afefe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 641a513 Workaround for zip archiver for contents info