$ git clone -n https://src.fedoraproject.org/rpms/pdfgrep.git /var/lib/mock/f39-build-1470225-33885/root/chroot_tmpdir/scmroot/pdfgrep
Cloning into '/var/lib/mock/f39-build-1470225-33885/root/chroot_tmpdir/scmroot/pdfgrep'...
$ git fetch origin 90e279ff61a2a12525748df63b7dfdf3b1b578d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pdfgrep
 * [new ref]         90e279ff61a2a12525748df63b7dfdf3b1b578d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90e279f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild