$ git clone -n https://src.fedoraproject.org/rpms/perl-IRI.git /var/lib/mock/f41-build-side-1-2781532-32531/root/chroot_tmpdir/scmroot/perl-IRI
Cloning into '/var/lib/mock/f41-build-side-1-2781532-32531/root/chroot_tmpdir/scmroot/perl-IRI'...
$ git fetch origin 41571d53d58928fc0b33f56d9b392b39c6bed069:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IRI
 * [new ref]         41571d53d58928fc0b33f56d9b392b39c6bed069 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41571d5 0.012 bump