$ git clone -n https://src.fedoraproject.org/rpms/kf5-kdelibs4support.git /var/lib/mock/f38-build-729654-101821/root/chroot_tmpdir/scmroot/kf5-kdelibs4support
Cloning into '/var/lib/mock/f38-build-729654-101821/root/chroot_tmpdir/scmroot/kf5-kdelibs4support'...
$ git fetch origin 303dc00de9e2813d602a8ed91b638fa1d88f247f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kdelibs4support
 * [new ref]         303dc00de9e2813d602a8ed91b638fa1d88f247f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 303dc00 5.107.0