$ git clone -n https://src.fedoraproject.org/rpms/rust-quote.git /var/lib/mock/f42-build-side-1-3539971-46572/root/chroot_tmpdir/scmroot/rust-quote
Cloning into '/var/lib/mock/f42-build-side-1-3539971-46572/root/chroot_tmpdir/scmroot/rust-quote'...
$ git fetch origin 400353e2b27bc658068b024537479147721bcf3b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-quote
 * [new ref]         400353e2b27bc658068b024537479147721bcf3b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 400353e Update to version 1.0.40; Fixes RHBZ#2351447