$ git clone -n https://src.fedoraproject.org/rpms/corsix-th.git /var/lib/mock/f45-build-4708-333/root/chroot_tmpdir/scmroot/corsix-th
Cloning into '/var/lib/mock/f45-build-4708-333/root/chroot_tmpdir/scmroot/corsix-th'...
$ git fetch origin 947cd732b8525a984c003ad0cca22527b62ccd2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/corsix-th
 * [new ref]         947cd732b8525a984c003ad0cca22527b62ccd2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 947cd73 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild