$ git clone -n https://src.fedoraproject.org/rpms/gutenprint.git /var/lib/mock/f45-build-13260-448/root/chroot_tmpdir/scmroot/gutenprint
Cloning into '/var/lib/mock/f45-build-13260-448/root/chroot_tmpdir/scmroot/gutenprint'...
$ git fetch origin 020741b52725a80bd202b814cbe692e2705f9072:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gutenprint
 * [new ref]         020741b52725a80bd202b814cbe692e2705f9072 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 020741b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild