$ git clone -n https://src.fedoraproject.org/rpms/rust-intrusive-collections.git /var/lib/mock/f45-build-42624-795/root/chroot_tmpdir/scmroot/rust-intrusive-collections
Cloning into '/var/lib/mock/f45-build-42624-795/root/chroot_tmpdir/scmroot/rust-intrusive-collections'...
$ git fetch origin fc20013b69730e1d9dd6cf8f75a3d82e442ea0e2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-intrusive-collections
 * [new ref]         fc20013b69730e1d9dd6cf8f75a3d82e442ea0e2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc20013 Update to version 0.10.3; Fixes RHBZ#2510986