$ git clone -n https://src.fedoraproject.org/rpms/perl-Data-Clone.git /var/lib/mock/f40-build-2016340-46181/root/chroot_tmpdir/scmroot/perl-Data-Clone
Cloning into '/var/lib/mock/f40-build-2016340-46181/root/chroot_tmpdir/scmroot/perl-Data-Clone'...
$ git fetch origin 5fb3f5c447b88c3fd013373e14c5cef9f4ac7616:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Data-Clone
 * [new ref]         5fb3f5c447b88c3fd013373e14c5cef9f4ac7616 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5fb3f5c Update to 0.006