$ git clone -n https://src.fedoraproject.org/rpms/perl-Test-Taint.git /var/lib/mock/f39-build-1435206-31977/root/chroot_tmpdir/scmroot/perl-Test-Taint
Cloning into '/var/lib/mock/f39-build-1435206-31977/root/chroot_tmpdir/scmroot/perl-Test-Taint'...
$ git fetch origin f1640d2052c2c80d2f0427ed30156b3220d77246:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test-Taint
 * [new ref]         f1640d2052c2c80d2f0427ed30156b3220d77246 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1640d2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild