$ git clone -n https://src.fedoraproject.org/rpms/gnome-mime-data.git /var/lib/mock/f41-build-756775-13422/root/chroot_tmpdir/scmroot/gnome-mime-data
Cloning into '/var/lib/mock/f41-build-756775-13422/root/chroot_tmpdir/scmroot/gnome-mime-data'...
$ git fetch origin c3c28b6fa8a27de881d3c7c39d7405e6729e9ada:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-mime-data
 * [new ref]         c3c28b6fa8a27de881d3c7c39d7405e6729e9ada -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3c28b6 Eliminate use of obsolete %patchN syntax (#2283636)