$ git clone -n https://src.fedoraproject.org/rpms/libkscreen.git /var/lib/mock/f41-build-847430-163983/root/chroot_tmpdir/scmroot/libkscreen
Cloning into '/var/lib/mock/f41-build-847430-163983/root/chroot_tmpdir/scmroot/libkscreen'...
$ git fetch origin 815f4f3d2158b42d0d7a5b920c6d12c73ee710b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkscreen
 * [new ref]         815f4f3d2158b42d0d7a5b920c6d12c73ee710b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 815f4f3 6.1.5