$ git clone -n https://src.fedoraproject.org/rpms/perl-Dancer2.git /var/lib/mock/f40-build-2229317-53146/root/chroot_tmpdir/scmroot/perl-Dancer2
Cloning into '/var/lib/mock/f40-build-2229317-53146/root/chroot_tmpdir/scmroot/perl-Dancer2'...
$ git fetch origin 0c811e3cc1fb08544611137f452170660c1b91c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Dancer2
 * [new ref]         0c811e3cc1fb08544611137f452170660c1b91c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c811e3 Update to 1.1.0