$ git clone -n https://src.fedoraproject.org/rpms/rust-imara-diff.git /var/lib/mock/f45-build-42531-794/root/chroot_tmpdir/scmroot/rust-imara-diff
Cloning into '/var/lib/mock/f45-build-42531-794/root/chroot_tmpdir/scmroot/rust-imara-diff'...
$ git fetch origin 1a1d33f830d59047cbacd4c9a155cf001d2d6ba1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-imara-diff
 * [new ref]         1a1d33f830d59047cbacd4c9a155cf001d2d6ba1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a1d33f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild