$ git clone -n https://src.fedoraproject.org/rpms/rust-option-operations.git /var/lib/mock/f45-build-43562-804/root/chroot_tmpdir/scmroot/rust-option-operations
Cloning into '/var/lib/mock/f45-build-43562-804/root/chroot_tmpdir/scmroot/rust-option-operations'...
$ git fetch origin 9d26ce03e72e86358e9b978b7ee35af1624314e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-option-operations
 * [new ref]         9d26ce03e72e86358e9b978b7ee35af1624314e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d26ce0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild