$ git clone -n https://src.fedoraproject.org/rpms/python-rosinstall_generator.git /var/lib/mock/f39-build-1454365-32903/root/chroot_tmpdir/scmroot/python-rosinstall_generator
Cloning into '/var/lib/mock/f39-build-1454365-32903/root/chroot_tmpdir/scmroot/python-rosinstall_generator'...
$ git fetch origin 8821b2a8d2335f23dacb5cf10fd3132d665b44df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-rosinstall_generator
 * [new ref]         8821b2a8d2335f23dacb5cf10fd3132d665b44df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8821b2a Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild