$ git clone -n https://src.fedoraproject.org/rpms/dolphin.git /var/lib/mock/f42-build-side-1-3506330-45996/root/chroot_tmpdir/scmroot/dolphin
Cloning into '/var/lib/mock/f42-build-side-1-3506330-45996/root/chroot_tmpdir/scmroot/dolphin'...
$ git fetch origin b3a42eb2de3d777e3dcbbdffd4066e3f006ef94d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dolphin
 * [new ref]         b3a42eb2de3d777e3dcbbdffd4066e3f006ef94d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3a42eb Added patch for session restore