$ git clone -n https://src.fedoraproject.org/rpms/fedora-packager.git /var/lib/mock/f39-build-1844353-42052/root/chroot_tmpdir/scmroot/fedora-packager
Cloning into '/var/lib/mock/f39-build-1844353-42052/root/chroot_tmpdir/scmroot/fedora-packager'...
$ git fetch origin e3a7199c28fa0a8b9f4ac3241c54b593a8e2ac89:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fedora-packager
 * [new ref]         e3a7199c28fa0a8b9f4ac3241c54b593a8e2ac89 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3a7199 Pull in rpmautospec