$ git clone -n https://src.fedoraproject.org/rpms/rust-syn1.git /var/lib/mock/f40-build-2063908-49167/root/chroot_tmpdir/scmroot/rust-syn1
Cloning into '/var/lib/mock/f40-build-2063908-49167/root/chroot_tmpdir/scmroot/rust-syn1'...
$ git fetch origin d57663f3d5990ec2d62b1d1064c8c786d794cfbd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-syn1
 * [new ref]         d57663f3d5990ec2d62b1d1064c8c786d794cfbd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d57663f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild