$ git clone -n https://src.fedoraproject.org/rpms/rust-serde_urlencoded.git /var/lib/mock/f39-build-1494682-34542/root/chroot_tmpdir/scmroot/rust-serde_urlencoded
Cloning into '/var/lib/mock/f39-build-1494682-34542/root/chroot_tmpdir/scmroot/rust-serde_urlencoded'...
$ git fetch origin 75c9cbe31c76ded6ede4edc794cdb3c81be89878:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serde_urlencoded
 * [new ref]         75c9cbe31c76ded6ede4edc794cdb3c81be89878 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 75c9cbe Regenerate with rust2rpm v24