$ git clone -n http://fedora.riscv.rocks:3000/rpms/glibc.git /var/lib/mock/f42-build-867550-175628/root/chroot_tmpdir/scmroot/glibc
Cloning into '/var/lib/mock/f42-build-867550-175628/root/chroot_tmpdir/scmroot/glibc'...
$ git fetch origin 49b91cd11ca5bf7ed3778d5021aba9fd7f6654c9:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/glibc
 * [new ref]         49b91cd11ca5bf7ed3778d5021aba9fd7f6654c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 49b91cd Fix merge