$ git clone -n https://src.fedoraproject.org/rpms/rust-bigdecimal0.3.git /var/lib/mock/f40-build-2231284-53270/root/chroot_tmpdir/scmroot/rust-bigdecimal0.3
Cloning into '/var/lib/mock/f40-build-2231284-53270/root/chroot_tmpdir/scmroot/rust-bigdecimal0.3'...
$ git fetch origin 404e79f0929d060ba1ef08620aea1fe8874ea243:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bigdecimal0.3
 * [new ref]         404e79f0929d060ba1ef08620aea1fe8874ea243 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 404e79f Initial import (bigdecimal 0.3 compat package)