$ git clone -n https://src.fedoraproject.org/rpms/poppler.git /var/lib/mock/f45-build-43757-805/root/chroot_tmpdir/scmroot/poppler
Cloning into '/var/lib/mock/f45-build-43757-805/root/chroot_tmpdir/scmroot/poppler'...
$ git fetch origin ab357b7d0ee5de297fc491394fd9fd8416df275e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/poppler
 * [new ref]         ab357b7d0ee5de297fc491394fd9fd8416df275e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab357b7 Update to 26.08.0