$ git clone -n https://src.fedoraproject.org/rpms/rust-tokio-macros.git /var/lib/mock/f39-build-1489204-34501/root/chroot_tmpdir/scmroot/rust-tokio-macros
Cloning into '/var/lib/mock/f39-build-1489204-34501/root/chroot_tmpdir/scmroot/rust-tokio-macros'...
$ git fetch origin 1900421c701935ea3755877e1494ba0930456b08:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tokio-macros
 * [new ref]         1900421c701935ea3755877e1494ba0930456b08 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1900421 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild