$ git clone -n https://src.fedoraproject.org/rpms/dtkcore.git /var/lib/mock/f41-build-847290-163873/root/chroot_tmpdir/scmroot/dtkcore
Cloning into '/var/lib/mock/f41-build-847290-163873/root/chroot_tmpdir/scmroot/dtkcore'...
$ git fetch origin 29387539bf4c0590a1b3e4cd097a24b7855a1744:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtkcore
 * [new ref]         29387539bf4c0590a1b3e4cd097a24b7855a1744 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2938753 Rebuild (qt5)