$ git clone -n https://src.fedoraproject.org/rpms/rust-utf-8.git /var/lib/mock/f40-build-2040567-48366/root/chroot_tmpdir/scmroot/rust-utf-8
Cloning into '/var/lib/mock/f40-build-2040567-48366/root/chroot_tmpdir/scmroot/rust-utf-8'...
$ git fetch origin bd9961d2c463ca8a3c7bb4fee82ba09446fbcccf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-utf-8
 * [new ref]         bd9961d2c463ca8a3c7bb4fee82ba09446fbcccf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd9961d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild