$ git clone -n https://src.fedoraproject.org/rpms/jreen.git /var/lib/mock/f38-build-side-42-init-devel-1212310-30633/root/chroot_tmpdir/scmroot/jreen
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1212310-30633/root/chroot_tmpdir/scmroot/jreen'...
$ git fetch origin 3b4df93a3d02b480db1def823c3937a7c5b1e527:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jreen
 * [new ref]         3b4df93a3d02b480db1def823c3937a7c5b1e527 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b4df93 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild