$ git clone -n https://src.fedoraproject.org/rpms/rubygem-guard-shell.git /var/lib/mock/f40-build-2639174-66341/root/chroot_tmpdir/scmroot/rubygem-guard-shell
Cloning into '/var/lib/mock/f40-build-2639174-66341/root/chroot_tmpdir/scmroot/rubygem-guard-shell'...
$ git fetch origin 4f40b1fd282cdef882606ba744d7884585ec49ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-guard-shell
 * [new ref]         4f40b1fd282cdef882606ba744d7884585ec49ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f40b1f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild