$ git clone -n https://src.fedoraproject.org/rpms/wide-dhcpv6.git /var/lib/mock/f45-build-38370-723/root/chroot_tmpdir/scmroot/wide-dhcpv6
Cloning into '/var/lib/mock/f45-build-38370-723/root/chroot_tmpdir/scmroot/wide-dhcpv6'...
$ git fetch origin 1af575a915b53ede7acb04827c6b9d725f43cbe7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wide-dhcpv6
 * [new ref]         1af575a915b53ede7acb04827c6b9d725f43cbe7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1af575a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild