$ git clone -n https://src.fedoraproject.org/rpms/java-25-openjdk.git /var/lib/mock/f45-build-46467-835/root/chroot_tmpdir/scmroot/java-25-openjdk
Cloning into '/var/lib/mock/f45-build-46467-835/root/chroot_tmpdir/scmroot/java-25-openjdk'...
$ git fetch origin e55a3d45327b3ef6b16e75c53b41dc4ac4dccbca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-25-openjdk
 * [new ref]         e55a3d45327b3ef6b16e75c53b41dc4ac4dccbca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e55a3d4 25.0.4.1.1