$ git clone -n https://src.fedoraproject.org/rpms/webkitgtk.git /var/lib/mock/f42-build-861866-170470/root/chroot_tmpdir/scmroot/webkitgtk
Cloning into '/var/lib/mock/f42-build-861866-170470/root/chroot_tmpdir/scmroot/webkitgtk'...
$ git fetch origin e054a63d21b6cdc809b40993f0e6c0bf7e71dc28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/webkitgtk
 * [new ref]         e054a63d21b6cdc809b40993f0e6c0bf7e71dc28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e054a63 Rebuild for ICU 76