$ git clone -n https://src.fedoraproject.org/rpms/rubygem-test_construct.git /var/lib/mock/f39-build-1892152-42799/root/chroot_tmpdir/scmroot/rubygem-test_construct
Cloning into '/var/lib/mock/f39-build-1892152-42799/root/chroot_tmpdir/scmroot/rubygem-test_construct'...
$ git fetch origin 8faf7e017f306d1731378ef39e5ee2bc9c2833c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-test_construct
 * [new ref]         8faf7e017f306d1731378ef39e5ee2bc9c2833c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8faf7e0 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild