$ git clone -n https://src.fedoraproject.org/rpms/java-11-openjdk.git /var/lib/mock/f40-build-2704668-70966/root/chroot_tmpdir/scmroot/java-11-openjdk
Cloning into '/var/lib/mock/f40-build-2704668-70966/root/chroot_tmpdir/scmroot/java-11-openjdk'...
$ git fetch origin 38f281f0924e53a4b28a65010af1edc5e2d65618:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-11-openjdk
 * [new ref]         38f281f0924e53a4b28a65010af1edc5e2d65618 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38f281f Merge branch 'rawhide' into f40