$ git clone -n https://src.fedoraproject.org/rpms/java-21-openjdk.git /var/lib/mock/f40-build-1737373-24672/root/chroot_tmpdir/scmroot/java-21-openjdk
Cloning into '/var/lib/mock/f40-build-1737373-24672/root/chroot_tmpdir/scmroot/java-21-openjdk'...
$ git fetch origin cefb62a2d8c0c68592e0254e7c3fea3f46f99b73:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-21-openjdk
 * [new ref]         cefb62a2d8c0c68592e0254e7c3fea3f46f99b73 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cefb62a Merge branch 'rawhide' into f40