$ git clone -n https://src.fedoraproject.org/rpms/rust-string-cases.git /var/lib/mock/f45-build-45209-821/root/chroot_tmpdir/scmroot/rust-string-cases
Cloning into '/var/lib/mock/f45-build-45209-821/root/chroot_tmpdir/scmroot/rust-string-cases'...
$ git fetch origin 70e7d1091919b8aa585fe0032c9ce02ed9a4a3c7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-string-cases
 * [new ref]         70e7d1091919b8aa585fe0032c9ce02ed9a4a3c7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70e7d10 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild