$ git clone -n https://src.fedoraproject.org/rpms/golang-x-exp.git /var/lib/mock/f38-build-685003-80540/root/chroot_tmpdir/scmroot/golang-x-exp
Cloning into '/var/lib/mock/f38-build-685003-80540/root/chroot_tmpdir/scmroot/golang-x-exp'...
$ git reset --hard 015489c21a1abdb9839bafe9e0801c114f566602
HEAD is now at 015489c Rebuild to fix FTBFS