$ git clone -n https://src.fedoraproject.org/rpms/golang-github-andybalholm-cascadia.git /var/lib/mock/f45-build-11734-434/root/chroot_tmpdir/scmroot/golang-github-andybalholm-cascadia
Cloning into '/var/lib/mock/f45-build-11734-434/root/chroot_tmpdir/scmroot/golang-github-andybalholm-cascadia'...
$ git fetch origin 18d19b94481d0a410fde0b43f8abc31741767d51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-andybalholm-cascadia
 * [new ref]         18d19b94481d0a410fde0b43f8abc31741767d51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 18d19b9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild