$ git clone -n https://src.fedoraproject.org/rpms/libkscreen.git /var/lib/mock/f42-build-side-1-3569461-46747/root/chroot_tmpdir/scmroot/libkscreen
Cloning into '/var/lib/mock/f42-build-side-1-3569461-46747/root/chroot_tmpdir/scmroot/libkscreen'...
$ git fetch origin 1845bf2d63bbb10057fe1e45ae7c5bce55880509:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libkscreen
 * [new ref]         1845bf2d63bbb10057fe1e45ae7c5bce55880509 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1845bf2 6.4.0