$ git clone -n https://src.fedoraproject.org/rpms/java-17-openjdk.git /var/lib/mock/f39-build-1888789-42791/root/chroot_tmpdir/scmroot/java-17-openjdk
Cloning into '/var/lib/mock/f39-build-1888789-42791/root/chroot_tmpdir/scmroot/java-17-openjdk'...
$ git fetch origin b82a5a9bf238f95ad82ef22fd28b51949c173116:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-17-openjdk
 * [new ref]         b82a5a9bf238f95ad82ef22fd28b51949c173116 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b82a5a9 updated to OpenJDK 17.0.9 (2023-10-17)