$ git clone -n https://src.fedoraproject.org/rpms/rust-spin_on.git /var/lib/mock/f39-build-1445324-32652/root/chroot_tmpdir/scmroot/rust-spin_on
Cloning into '/var/lib/mock/f39-build-1445324-32652/root/chroot_tmpdir/scmroot/rust-spin_on'...
$ git fetch origin 92e82dbb28741d7c43d9c58141acb645f5c27928:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-spin_on
 * [new ref]         92e82dbb28741d7c43d9c58141acb645f5c27928 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92e82db Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild