$ git clone -n https://src.fedoraproject.org/rpms/koko.git /var/lib/mock/f40-build-2241739-53669/root/chroot_tmpdir/scmroot/koko
Cloning into '/var/lib/mock/f40-build-2241739-53669/root/chroot_tmpdir/scmroot/koko'...
$ git fetch origin a9d2b167509803a8ecf757e3e5fa1556c726978d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/koko
 * [new ref]         a9d2b167509803a8ecf757e3e5fa1556c726978d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
Updating files:  83% (5/6)
Updating files: 100% (6/6)
Updating files: 100% (6/6), done.
HEAD is now at a9d2b16 24.01.90