$ git clone -n https://src.fedoraproject.org/rpms/golang-github-ziutek-mymysql.git /var/lib/mock/f41-build-1036525-18736/root/chroot_tmpdir/scmroot/golang-github-ziutek-mymysql
Cloning into '/var/lib/mock/f41-build-1036525-18736/root/chroot_tmpdir/scmroot/golang-github-ziutek-mymysql'...
$ git fetch origin 9726f326594e072880104ca4bac0f73af1f47377:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-ziutek-mymysql
 * [new ref]         9726f326594e072880104ca4bac0f73af1f47377 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9726f32 Fix FTBFS