$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-langid-macros.git /var/lib/mock/f39-build-1500217-34784/root/chroot_tmpdir/scmroot/rust-unic-langid-macros
Cloning into '/var/lib/mock/f39-build-1500217-34784/root/chroot_tmpdir/scmroot/rust-unic-langid-macros'...
$ git fetch origin de90f6048dbc5ca9efe084a4d9a4104cb443dc42:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-langid-macros
 * [new ref]         de90f6048dbc5ca9efe084a4d9a4104cb443dc42 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de90f60 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild