$ git clone -n https://src.fedoraproject.org/rpms/greybird.git /var/lib/mock/f40-build-2003238-44818/root/chroot_tmpdir/scmroot/greybird
Cloning into '/var/lib/mock/f40-build-2003238-44818/root/chroot_tmpdir/scmroot/greybird'...
$ git fetch origin 849295b043d9764cfa7c23f51cb1882c0e5d914d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/greybird
 * [new ref]         849295b043d9764cfa7c23f51cb1882c0e5d914d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 849295b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild