$ git clone -n https://src.fedoraproject.org/rpms/golang-cloud-google-spanner.git /var/lib/mock/f45-build-47369-867/root/chroot_tmpdir/scmroot/golang-cloud-google-spanner
Cloning into '/var/lib/mock/f45-build-47369-867/root/chroot_tmpdir/scmroot/golang-cloud-google-spanner'...
$ git fetch origin 86e8745d583349e32cb5fa00fc77d9fc59e15162:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-cloud-google-spanner
 * [new ref]         86e8745d583349e32cb5fa00fc77d9fc59e15162 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86e8745 Rebuild for https://fedoraproject.org/wiki/Changes/golang1.26