$ git clone -n https://src.fedoraproject.org/rpms/whatmask.git /var/lib/mock/f41-build-726031-13125/root/chroot_tmpdir/scmroot/whatmask
Cloning into '/var/lib/mock/f41-build-726031-13125/root/chroot_tmpdir/scmroot/whatmask'...
$ git fetch origin d3cf9fe83e1b35ada55522d3ed42faf38c468e1b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/whatmask
 * [new ref]         d3cf9fe83e1b35ada55522d3ed42faf38c468e1b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3cf9fe Eliminate use of obsolete %patchN syntax (#2283636)