$ git clone -n https://src.fedoraproject.org/rpms/dtklog.git /var/lib/mock/f42-build-3272947-41309/root/chroot_tmpdir/scmroot/dtklog
Cloning into '/var/lib/mock/f42-build-3272947-41309/root/chroot_tmpdir/scmroot/dtklog'...
$ git fetch origin 3dbeac09faee5605d84182fd7905e6118085b959:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtklog
 * [new ref]         3dbeac09faee5605d84182fd7905e6118085b959 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3dbeac0 Rebuild (qt5)