$ git clone -n https://src.fedoraproject.org/rpms/jmock.git /var/lib/mock/f40-build-2634694-66023/root/chroot_tmpdir/scmroot/jmock
Cloning into '/var/lib/mock/f40-build-2634694-66023/root/chroot_tmpdir/scmroot/jmock'...
$ git fetch origin 90a87673a31d3843d5abe5e08284d2658e4ab4cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jmock
 * [new ref]         90a87673a31d3843d5abe5e08284d2658e4ab4cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90a8767 Rebuilt for java-21-openjdk as system jdk