$ git clone -n https://src.fedoraproject.org/rpms/gom.git /var/lib/mock/f41-build-836997-158946/root/chroot_tmpdir/scmroot/gom
Cloning into '/var/lib/mock/f41-build-836997-158946/root/chroot_tmpdir/scmroot/gom'...
$ git fetch origin 438077cea77dd1f9b827a8ef90705315566b1334:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gom
 * [new ref]         438077cea77dd1f9b827a8ef90705315566b1334 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 438077c Update to 0.5.3