$ git clone -n https://src.fedoraproject.org/rpms/hdf5.git /var/lib/mock/f39-build-2478943-61579/root/chroot_tmpdir/scmroot/hdf5
Cloning into '/var/lib/mock/f39-build-2478943-61579/root/chroot_tmpdir/scmroot/hdf5'...
$ git fetch origin ca3ac038945ba431dcfc0bf2ea11104682c94151:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hdf5
 * [new ref]         ca3ac038945ba431dcfc0bf2ea11104682c94151 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca3ac03 Rebuilt for java-21-openjdk as system jdk