$ git clone -n https://src.fedoraproject.org/rpms/objenesis.git /var/lib/mock/f40-build-1893946-25063/root/chroot_tmpdir/scmroot/objenesis
Cloning into '/var/lib/mock/f40-build-1893946-25063/root/chroot_tmpdir/scmroot/objenesis'...
$ git fetch origin 345d50ac50a247d40ac17bd3a74dff9e04093c97:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/objenesis
 * [new ref]         345d50ac50a247d40ac17bd3a74dff9e04093c97 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 345d50a Rebuilt for java-21-openjdk as system jdk