$ git clone -n https://src.fedoraproject.org/rpms/greybird.git /var/lib/mock/f38-build-side-42-init-devel-676769-26691/root/chroot_tmpdir/scmroot/greybird
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-676769-26691/root/chroot_tmpdir/scmroot/greybird'...
$ git fetch origin b1300a2bdcef3715622f4bc50ad3e06ad8d00f17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/greybird
 * [new ref]         b1300a2bdcef3715622f4bc50ad3e06ad8d00f17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b1300a2 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild