$ git clone -n https://src.fedoraproject.org/rpms/rust-document-features.git /var/lib/mock/f45-build-41413-782/root/chroot_tmpdir/scmroot/rust-document-features
Cloning into '/var/lib/mock/f45-build-41413-782/root/chroot_tmpdir/scmroot/rust-document-features'...
$ git fetch origin 64d31b275dc9ced2790ef1c1f283c76f86707484:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-document-features
 * [new ref]         64d31b275dc9ced2790ef1c1f283c76f86707484 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64d31b2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild