$ git clone -n https://src.fedoraproject.org/rpms/rust-mime_guess.git /var/lib/mock/f40-build-2714438-72306/root/chroot_tmpdir/scmroot/rust-mime_guess
Cloning into '/var/lib/mock/f40-build-2714438-72306/root/chroot_tmpdir/scmroot/rust-mime_guess'...
$ git fetch origin 55ed4b84f44332dbc0d178a1f6ee34834d8f89e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-mime_guess
 * [new ref]         55ed4b84f44332dbc0d178a1f6ee34834d8f89e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55ed4b8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild