$ git clone -n https://src.fedoraproject.org/rpms/coreutils.git /var/lib/mock/f41-build-side-1-2811110-32926/root/chroot_tmpdir/scmroot/coreutils
Cloning into '/var/lib/mock/f41-build-side-1-2811110-32926/root/chroot_tmpdir/scmroot/coreutils'...
$ git fetch origin 8080f5a15a20362c10d4c46c471d4a4a486e9e15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/coreutils
 * [new ref]         8080f5a15a20362c10d4c46c471d4a4a486e9e15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8080f5a fix fold -b with UTF8 locale