$ git clone -n https://src.fedoraproject.org/rpms/git-annex.git /var/lib/mock/f38-build-side-42-init-devel-1227389-30640/root/chroot_tmpdir/scmroot/git-annex
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1227389-30640/root/chroot_tmpdir/scmroot/git-annex'...
$ git fetch origin a3e31a5060506cb5cddd80f97dddec2556dcd2d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/git-annex
 * [new ref]         a3e31a5060506cb5cddd80f97dddec2556dcd2d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3e31a5 Update to latest version (#2164881)