$ git clone -n https://src.fedoraproject.org/rpms/emacs-async.git /var/lib/mock/f45-build-8044-374/root/chroot_tmpdir/scmroot/emacs-async
Cloning into '/var/lib/mock/f45-build-8044-374/root/chroot_tmpdir/scmroot/emacs-async'...
$ git fetch origin 2ebf36da0ec4cd8cace25cf86177fac08cacb8b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-async
 * [new ref]         2ebf36da0ec4cd8cace25cf86177fac08cacb8b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ebf36d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild