$ git clone -n https://src.fedoraproject.org/rpms/rust-base16ct.git /var/lib/mock/f40-build-2652171-66891/root/chroot_tmpdir/scmroot/rust-base16ct
Cloning into '/var/lib/mock/f40-build-2652171-66891/root/chroot_tmpdir/scmroot/rust-base16ct'...
$ git fetch origin b785db4d81b44a8216b950b48ad169b733800c30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-base16ct
 * [new ref]         b785db4d81b44a8216b950b48ad169b733800c30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b785db4 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild