$ git clone -n https://src.fedoraproject.org/rpms/rubygem-pdfkit.git /var/lib/mock/f40-build-2639284-66351/root/chroot_tmpdir/scmroot/rubygem-pdfkit
Cloning into '/var/lib/mock/f40-build-2639284-66351/root/chroot_tmpdir/scmroot/rubygem-pdfkit'...
$ git fetch origin 75240474c5de62947dcc1ae7760faee4d3980e75:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-pdfkit
 * [new ref]         75240474c5de62947dcc1ae7760faee4d3980e75 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7524047 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild