$ git clone -n https://src.fedoraproject.org/rpms/kitty.git /var/lib/mock/f39-build-1550750-36955/root/chroot_tmpdir/scmroot/kitty
Cloning into '/var/lib/mock/f39-build-1550750-36955/root/chroot_tmpdir/scmroot/kitty'...
$ git fetch origin 595d70cb2a7e3bb42c7ee294c9242c6618ffae0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kitty
 * [new ref]         595d70cb2a7e3bb42c7ee294c9242c6618ffae0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 595d70c generate go buildrequires