$ git clone -n https://github.com/fedora-riscv/R-pkgbuild.git /var/lib/mock/f38-build-side-42-init-devel-770260-27755/root/chroot_tmpdir/scmroot/R-pkgbuild
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-770260-27755/root/chroot_tmpdir/scmroot/R-pkgbuild'...
$ git fetch origin ff4886f09872a1c4820e650957e4b6bc33b6b736:KOJI_FETCH_HEAD
From https://github.com/fedora-riscv/R-pkgbuild
 * [new ref]         ff4886f09872a1c4820e650957e4b6bc33b6b736 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff4886f Bootstrap for Fedora 38 riscv64 rebuild.