$ git clone -n https://src.fedoraproject.org/rpms/icecat.git /var/lib/mock/f40-build-2489713-61655/root/chroot_tmpdir/scmroot/icecat
Cloning into '/var/lib/mock/f40-build-2489713-61655/root/chroot_tmpdir/scmroot/icecat'...
$ git fetch origin f6f8cc4499fe1db39f59a3e792b88156168416cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/icecat
 * [new ref]         f6f8cc4499fe1db39f59a3e792b88156168416cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f6f8cc4 Rebuilt for java-21-openjdk as system jdk