$ git clone -n https://src.fedoraproject.org/rpms/calls.git /var/lib/mock/f41-build-830627-156683/root/chroot_tmpdir/scmroot/calls
Cloning into '/var/lib/mock/f41-build-830627-156683/root/chroot_tmpdir/scmroot/calls'...
$ git fetch origin 59b337b789fe9dfbf3dcfc8d8ada19786fe94c0b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/calls
 * [new ref]         59b337b789fe9dfbf3dcfc8d8ada19786fe94c0b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59b337b Upstream release 47.0 beta 0 (fedora#2298930)