$ git clone -n https://src.fedoraproject.org/rpms/gtkimageview.git /var/lib/mock/f41-build-1021556-18027/root/chroot_tmpdir/scmroot/gtkimageview
Cloning into '/var/lib/mock/f41-build-1021556-18027/root/chroot_tmpdir/scmroot/gtkimageview'...
$ git fetch origin c31c73b006f8198f8aa1e3b077260107f4647735:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtkimageview
 * [new ref]         c31c73b006f8198f8aa1e3b077260107f4647735 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c31c73b Eliminate use of obsolete %patchN syntax (#2283636)