$ git clone -n https://src.fedoraproject.org/rpms/perl-File-LibMagic.git /var/lib/mock/f40-build-779623-130430/root/chroot_tmpdir/scmroot/perl-File-LibMagic
Cloning into '/var/lib/mock/f40-build-779623-130430/root/chroot_tmpdir/scmroot/perl-File-LibMagic'...
$ git fetch origin 79b022a5e0eaf44ee3f88c503f6339235e4ef6e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-File-LibMagic
 * [new ref]         79b022a5e0eaf44ee3f88c503f6339235e4ef6e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79b022a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild