$ git clone -n https://src.fedoraproject.org/rpms/kf5-kdewebkit.git /var/lib/mock/f38-build-729622-101821/root/chroot_tmpdir/scmroot/kf5-kdewebkit
Cloning into '/var/lib/mock/f38-build-729622-101821/root/chroot_tmpdir/scmroot/kf5-kdewebkit'...
$ git fetch origin a728aec5e5f16c86d9fd218e7eec2abb2796bc6a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kdewebkit
 * [new ref]         a728aec5e5f16c86d9fd218e7eec2abb2796bc6a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a728aec 5.107.0