$ git clone -n https://src.fedoraproject.org/rpms/ffcall.git /var/lib/mock/f45-build-8938-397/root/chroot_tmpdir/scmroot/ffcall
Cloning into '/var/lib/mock/f45-build-8938-397/root/chroot_tmpdir/scmroot/ffcall'...
$ git fetch origin 893d3b86892bfb68b15609b1d8e14f3ec6458c64:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ffcall
 * [new ref]         893d3b86892bfb68b15609b1d8e14f3ec6458c64 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 893d3b8 Note that gnulib is bundled