$ git clone -n https://src.fedoraproject.org/rpms/kf5-kjsembed.git /var/lib/mock/f39-build-1562385-37434/root/chroot_tmpdir/scmroot/kf5-kjsembed
Cloning into '/var/lib/mock/f39-build-1562385-37434/root/chroot_tmpdir/scmroot/kf5-kjsembed'...
$ git fetch origin 65cacc7c956fdab7eab38e2fdfa2c75379553958:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kjsembed
 * [new ref]         65cacc7c956fdab7eab38e2fdfa2c75379553958 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65cacc7 5.111.0