$ git clone -n https://src.fedoraproject.org/rpms/mingw-poppler.git /var/lib/mock/f39-build-1667222-40808/root/chroot_tmpdir/scmroot/mingw-poppler
Cloning into '/var/lib/mock/f39-build-1667222-40808/root/chroot_tmpdir/scmroot/mingw-poppler'...
$ git fetch origin 7cc382eedd3eda532291a580f2cc3c1596ca89e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-poppler
 * [new ref]         7cc382eedd3eda532291a580f2cc3c1596ca89e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7cc382e BR: mingw-gcc-c++