$ git clone -n https://src.fedoraproject.org/rpms/rubygem-metaclass.git /var/lib/mock/f40-build-2033951-47853/root/chroot_tmpdir/scmroot/rubygem-metaclass
Cloning into '/var/lib/mock/f40-build-2033951-47853/root/chroot_tmpdir/scmroot/rubygem-metaclass'...
$ git fetch origin 7055763db0591c6d66e9c56f27fe646e41466ef4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-metaclass
 * [new ref]         7055763db0591c6d66e9c56f27fe646e41466ef4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7055763 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild