$ git clone -n https://src.fedoraproject.org/rpms/rust-llvm-bitcode.git /var/lib/mock/f45-build-43023-799/root/chroot_tmpdir/scmroot/rust-llvm-bitcode
Cloning into '/var/lib/mock/f45-build-43023-799/root/chroot_tmpdir/scmroot/rust-llvm-bitcode'...
$ git fetch origin 2cdd5a596b61a7ddc41c1ddb8fcb8adecca40ea0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-llvm-bitcode
 * [new ref]         2cdd5a596b61a7ddc41c1ddb8fcb8adecca40ea0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2cdd5a5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild