$ git clone -n https://src.fedoraproject.org/rpms/containers-common.git /var/lib/mock/f42-build-3293303-41426/root/chroot_tmpdir/scmroot/containers-common
Cloning into '/var/lib/mock/f42-build-3293303-41426/root/chroot_tmpdir/scmroot/containers-common'...
$ git fetch origin f00abc7ee6f483681023749fd43448addd075d1e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/containers-common
 * [new ref]         f00abc7ee6f483681023749fd43448addd075d1e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f00abc7 remove patch merged upstream