$ git clone -n https://src.fedoraproject.org/rpms/bcftools.git /var/lib/mock/f41-build-1046645-19094/root/chroot_tmpdir/scmroot/bcftools
Cloning into '/var/lib/mock/f41-build-1046645-19094/root/chroot_tmpdir/scmroot/bcftools'...
$ git fetch origin 2f6b1e2fef40d546966386ea7b2d6dfe8ed54366:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bcftools
 * [new ref]         2f6b1e2fef40d546966386ea7b2d6dfe8ed54366 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f6b1e2 Perl 5.40 rebuild