$ git clone -n https://src.fedoraproject.org/rpms/java-17-openjdk.git /var/lib/mock/f39-build-2032161-47670/root/chroot_tmpdir/scmroot/java-17-openjdk
Cloning into '/var/lib/mock/f39-build-2032161-47670/root/chroot_tmpdir/scmroot/java-17-openjdk'...
$ git fetch origin 3188e193a8e139d619e5437972cd540c86e363f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-17-openjdk
 * [new ref]         3188e193a8e139d619e5437972cd540c86e363f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3188e19 proeprly filing debugsources pkg