$ git clone -n https://src.fedoraproject.org/rpms/rust-serde-big-array0.4.git /var/lib/mock/f45-build-44842-818/root/chroot_tmpdir/scmroot/rust-serde-big-array0.4
Cloning into '/var/lib/mock/f45-build-44842-818/root/chroot_tmpdir/scmroot/rust-serde-big-array0.4'...
$ git fetch origin 9992936251ce5f5595f982d87de819767775b89c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde-big-array0.4
 * [new ref]         9992936251ce5f5595f982d87de819767775b89c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9992936 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild