$ git clone -n https://src.fedoraproject.org/rpms/perl-Sys-Syscall.git /var/lib/mock/f40-build-2388216-60502/root/chroot_tmpdir/scmroot/perl-Sys-Syscall
Cloning into '/var/lib/mock/f40-build-2388216-60502/root/chroot_tmpdir/scmroot/perl-Sys-Syscall'...
$ git fetch origin 6d2c6dc678c4a771676e5d74a414c9c579a830ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Sys-Syscall
 * [new ref]         6d2c6dc678c4a771676e5d74a414c9c579a830ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d2c6dc Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild