$ git clone -n https://src.fedoraproject.org/rpms/java-17-openjdk-portable.git /var/lib/mock/f39-build-1788901-41735/root/chroot_tmpdir/scmroot/java-17-openjdk-portable
Cloning into '/var/lib/mock/f39-build-1788901-41735/root/chroot_tmpdir/scmroot/java-17-openjdk-portable'...
$ git fetch origin 289d0e958f24fa8759c01d48b05c8a4b71e599e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-17-openjdk-portable
 * [new ref]         289d0e958f24fa8759c01d48b05c8a4b71e599e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 289d0e9 updated to OpenJDK 17.0.9 (2023-10-17)