$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-hap.git /var/lib/mock/f41-build-side-1-2951835-35498/root/chroot_tmpdir/scmroot/gap-pkg-hap
Cloning into '/var/lib/mock/f41-build-side-1-2951835-35498/root/chroot_tmpdir/scmroot/gap-pkg-hap'...
$ git fetch origin ff39b640538668603a7be9daef459f47c30816f6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-hap
 * [new ref]         ff39b640538668603a7be9daef459f47c30816f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff39b64 Version 1.65