$ git clone -n https://src.fedoraproject.org/rpms/rust-iovec.git /var/lib/mock/f39-build-1521840-35862/root/chroot_tmpdir/scmroot/rust-iovec
Cloning into '/var/lib/mock/f39-build-1521840-35862/root/chroot_tmpdir/scmroot/rust-iovec'...
$ git fetch origin e19e0c56ce5c06714bfc5377357d1b02c96acf43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-iovec
 * [new ref]         e19e0c56ce5c06714bfc5377357d1b02c96acf43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e19e0c5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild