$ git clone -n https://src.fedoraproject.org/rpms/rust-gsk4_0.6.git /var/lib/mock/f40-build-2681089-67952/root/chroot_tmpdir/scmroot/rust-gsk4_0.6
Cloning into '/var/lib/mock/f40-build-2681089-67952/root/chroot_tmpdir/scmroot/rust-gsk4_0.6'...
$ git fetch origin 049f858c21f9d83f0a60d20fcb3cbda3339dc124:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gsk4_0.6
 * [new ref]         049f858c21f9d83f0a60d20fcb3cbda3339dc124 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 049f858 compat package no longer needed