$ git clone -n https://src.fedoraproject.org/rpms/kf5-kbookmarks.git /var/lib/mock/f38-build-729566-101817/root/chroot_tmpdir/scmroot/kf5-kbookmarks
Cloning into '/var/lib/mock/f38-build-729566-101817/root/chroot_tmpdir/scmroot/kf5-kbookmarks'...
$ git fetch origin a6154be3c105312a75032fd329d06f15f1acbe07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kbookmarks
 * [new ref]         a6154be3c105312a75032fd329d06f15f1acbe07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a6154be 5.107.0