$ git clone -n https://src.fedoraproject.org/rpms/rubygem-prawn-svg.git /var/lib/mock/f39-build-1499289-34744/root/chroot_tmpdir/scmroot/rubygem-prawn-svg
Cloning into '/var/lib/mock/f39-build-1499289-34744/root/chroot_tmpdir/scmroot/rubygem-prawn-svg'...
$ git fetch origin 19cba251ddbf7e0b70b3f29cca2cb7ec5210dcc6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-prawn-svg
 * [new ref]         19cba251ddbf7e0b70b3f29cca2cb7ec5210dcc6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19cba25 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild