$ git clone -n https://src.fedoraproject.org/rpms/perl-Mojo-IOLoop-ReadWriteProcess.git /var/lib/mock/f42-build-3465128-45737/root/chroot_tmpdir/scmroot/perl-Mojo-IOLoop-ReadWriteProcess
Cloning into '/var/lib/mock/f42-build-3465128-45737/root/chroot_tmpdir/scmroot/perl-Mojo-IOLoop-ReadWriteProcess'...
$ git fetch origin 5502d7630ed2d64d3134cc87010179a829a27699:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Mojo-IOLoop-ReadWriteProcess
 * [new ref]         5502d7630ed2d64d3134cc87010179a829a27699 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5502d76 Update to 1.1.0