$ git clone -n https://src.fedoraproject.org/rpms/R-showtext.git /var/lib/mock/f41-build-side-1-2645795-27204/root/chroot_tmpdir/scmroot/R-showtext
Cloning into '/var/lib/mock/f41-build-side-1-2645795-27204/root/chroot_tmpdir/scmroot/R-showtext'...
$ git fetch origin 55acdf1d2fee704119a531879ea08a5a3c2d17c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-showtext
 * [new ref]         55acdf1d2fee704119a531879ea08a5a3c2d17c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 55acdf1 convert license to SPDX