$ git clone -n https://src.fedoraproject.org/rpms/google-gson.git /var/lib/mock/f40-build-2529974-61829/root/chroot_tmpdir/scmroot/google-gson
Cloning into '/var/lib/mock/f40-build-2529974-61829/root/chroot_tmpdir/scmroot/google-gson'...
$ git fetch origin a079c83c1a8d4b9bf2d1708437d8cd45ee306e9d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/google-gson
 * [new ref]         a079c83c1a8d4b9bf2d1708437d8cd45ee306e9d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a079c83 Rebuilt for java-21-openjdk as system jdk