$ git clone -n https://src.fedoraproject.org/rpms/perl-ExtUtils-CChecker.git /var/lib/mock/f40-build-2623852-65016/root/chroot_tmpdir/scmroot/perl-ExtUtils-CChecker
Cloning into '/var/lib/mock/f40-build-2623852-65016/root/chroot_tmpdir/scmroot/perl-ExtUtils-CChecker'...
$ git fetch origin 5283b8f0b5f0608074aaaac3499a1360d1c5d44a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-ExtUtils-CChecker
 * [new ref]         5283b8f0b5f0608074aaaac3499a1360d1c5d44a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5283b8f Update to 0.12 (rhbz#2267821)