$ git clone -n https://src.fedoraproject.org/rpms/rust-bstr0.2.git /var/lib/mock/f40-build-2091697-50238/root/chroot_tmpdir/scmroot/rust-bstr0.2
Cloning into '/var/lib/mock/f40-build-2091697-50238/root/chroot_tmpdir/scmroot/rust-bstr0.2'...
$ git fetch origin 92d4b01bf478bdc123cb36977bd03b9ee1e8a55b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-bstr0.2
 * [new ref]         92d4b01bf478bdc123cb36977bd03b9ee1e8a55b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92d4b01 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild