$ git clone -n https://src.fedoraproject.org/rpms/golang-cloud-google-spanner.git /var/lib/mock/f40-build-2586699-62461/root/chroot_tmpdir/scmroot/golang-cloud-google-spanner
Cloning into '/var/lib/mock/f40-build-2586699-62461/root/chroot_tmpdir/scmroot/golang-cloud-google-spanner'...
$ git fetch origin 64809369653ea4a9d668b648dd3fa742c7fae32f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-cloud-google-spanner
 * [new ref]         64809369653ea4a9d668b648dd3fa742c7fae32f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6480936 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild